If a lapwing hull was built

[wwbaginski]

Just curious: if a Lapwing hull was built, would the rest things coming from my BRS17 fit to it? I mean masts'n'sails, rudder device, centerboard ?

I think no many BRS17 plans are sold, but the rig seems to be the same as CS 17 rig. So I hope there are few people who have both CS and Lapwing plans and might check it.

Just curious: if a Lapwing hull was built, would the rest things coming from my BRS17 fit to it? I mean masts'n'sails, rudder device, centerboard ?

I think no many BRS17 plans are sold, but the rig seems to be the same as CS 17 rig. So I hope there are few people who have both CS and Lapwing plans and might check it.

Just curious: if a Lapwing hull was built, would the rest things coming from my BRS17 fit to it? I mean masts'n'sails, rudder device, centerboard ?

I think no many BRS17 plans are sold, but the rig seems to be the same as CS 17 rig. So I hope there are few people who have both CS and Lapwing plans and might check it.

Just curious: if a Lapwing hull was built, would the rest things coming from my BRS17 fit to it? I mean masts'n'sails, rudder device, centerboard ?

I think no many BRS17 plans are sold, but the rig seems to be the same as CS 17 rig. So I hope there are few people who have both CS and Lapwing plans and might check it.

[Designer]

Hi Wojtek,

I just layed the BRS17 rig over the Lapwing to check for you and it will not fit as designed. The foot of both BRS sails are longer than the Lapwing's. Remember the Lapwing with a LOA of 15'8" is 1'4" (.406) shorter than the BRS17. The foot of the mainsail is about 1'4" shorter on the Lapwing with a similar proportion on the mizzen. The Lapwing frames could be spaced to make the boat longer or the sails would have to be cut down. The Lapwing rig identical to the Core Sound 15 rig. The other parts could be made to fit.

I must apologize for not replying to your last email. I received it while travelling up north and totally forgot about it when I returned home. You asked about the right fore and aft position for the staysail tack. Yours is way to far aft, it should be about .500 astern of the main mast and tacked to the windward rail. The idea is to make it fit between the two sails with the least interference. By that I mean that if the staysail is too close to the mainsail you will see the main get sucked back to the mizzen. If it is too close to the mizzen or sheeted too tight it will luff the mizzen. I feel that if the staysail reduces the power of the working sails then you might be better off without it.

You will also find that when the wind is too far aft you will see the main get sucked back to the staysail. When that happens, I gybe the main sail and go wing and wing with the main let out to at least 20 degrees forward of the beam. This allows the three sails to work with clean air. If the main is not let out forward of the beam, it will blow back at you. I have also played with moving the tack to the centerline while in this configuration but I need to try it in different conditions to be sure. As it is not a difficult sail to handle you should experiment with different positions.

Once you get the staysail worked out it can give you as much as 50% more speed.

[Tom Lathrop]

I have thought about the possibility of doing this same thing to Lapwing #1 when sailing in Woodenboat's regatta. Looking at the sailplans just as Graham did, I quickly came to the same conclusion. I thought about a larger rig since these boats are not heavily canvased and could use more when sailed in competition with a good crew. The only practical way to do it would be to make new or modify the existing sails for longer luffs and taller masts. The mizzen luff could be made longer but probably not worth the expense and the balance would be changed. Moving the mizzen aft to allow a larger main could be done but none of these are such a great choices. Lapwing is a geat boat as designed and just right for daysailing, especially singlehanded. The best thing I did for performance was to make wishboom booms and that is also overkill for daysailing.

[wwbaginski]

Hi Graham, hi Tom, many thanks for your explanations on a BRS/Lapwing rig question. I'm every time impressed with the difference which might be made with few inches - we in metric system have to use much more centimeters to do the same! And yes now watching photos and videos of Lapwing and CS15 i can see the sails are identical.

BRS17 is a great design anyway and the only problem is no enough time for more extensive use. So all experiments are to be done underway , during Finnish races. What i'm sure about is my sails are too heavy (7 oz dacron) in weak winds and I'd like to order a new set 3-3.5 oz. This might be a good opportunity to try the layot which has been proposed to my boat on the very beginning. It seems to me that "Dawn Patrol" uses the same shape but bigger area of course. Having that first sketch and DP photos i might ask my sailmaker to draw and make it . Is this right way of thinking?